In a 4-episode OVA series, each installment delves into unique side stories from the original material. 'Reshuffle' features Shana and Yuji switching bodies due to Friagne's treasure device, leading to a covert struggle to adapt. 'Domicile' follows Yuji and Wilhelmina as they shadow Shana, who displays unusual behavior, unraveling a hidden secret. 'Overture' unfolds in two parts: Shana assumes Oogami Junko's identity to ease her investigation amidst family turmoil, culminating in a gripping continuation in Part 2.